ok, old 305 TBI is out
have a rebuilt 350(probably a truck motor), Holley 670cfm TBI, Holley TBI intake, Crane Came(110deg lobe sep), Edlebrock Headers and Y-Pipe, 3"cat, Dynomax cat-back and muffler, 350 knock sensor and module, and calling Hypertech for a custom chip.
now does anyone think i would need a Adjustabe Fuel Pressure Regulator? or is that byult into the Holley 670 cfm TBI?
if i do need one would me building one be easier than buying one all ready made? I think i saw a Moroso unit at a local parts place here.
also do i need to change my ECM for one that will work with all this , or will the stock computer form my 89 Formula work?
anything else that anyone thinks i would need? motor is going in very soon, woul appriciate the help
thanks
Joe

 

I got my 350 to with a 110lsa cam to work with stock ecm, just had to get a custom chip like you mentioned

 

The Holly TB already has an adjustable fuel pressure regulator. And in my opinion, it's never worth it to buy one as opposed to making one considering you're paying approx. $60 for what you already have just with a hole drilled in it.

 

Oh, and the stock computer will work with the setup you described, but it would be a good idea to get a custom chip for it for the best performance.

If you think you do want to switch the actual ECM, you can switch to a 7747 which is used in a lot of other GM vehicles (trucks, vans, etc with TBI motors), becuase it is a lot more hacked than the computer that comes in F-Body TBI vehicles (so there's more support for programming it).